Very High Speed 1000V/µs, High Voltage 450V Power Amplifier

The PA85 is a high voltage, high power bandwidth MOS-
FET operational ampliier designed for output currents up to
200mA. Output voltages CAN swing up to 215V with a dual
supply and up to +440 volts with a single supply. The safe
operating area (SOA) has no second breakdown limitations
and CAN be observed with all types of loads by choosing an
appropriate current limiting resistor. High accuracy is achieved
with a cascode input circuit coniguration. All internal biasing is
referenced to a bootstrapped zener-MOSFET current source.
As a result, the PA85 features an unprecedented supply range
and excellent supply rejection. The MOSFET output stage is
biased on for linear operation. External compensation provides
user lexibility. By Cirrus Logic, Inc.